android使用HTTP协议读取数据

package com.dailei.httpget;import android.os.AsyncTask;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                new AsyncTask<String,Void,Void>() {                    @Override                    protected Void doInBackground(String... params) {                        try {                            URL uri = new URL(params[0]);                            URLConnection conn = uri.openConnection();                            InputStream inputStream = conn.getInputStream();                            InputStreamReader inputStreamReader = new InputStreamReader(inputStream);                            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);                            String line;                            while((line = bufferedReader.readLine()) != null) {                                System.out.println(line);                            }                            bufferedReader.close();                            inputStreamReader.close();                            inputStream.close();                        } catch (MalformedURLException e) {                            e.printStackTrace();                        } catch (IOException e) {                            e.printStackTrace();                        }                        return null;                    }                }.execute("http://fanyi.youdao.com/openapi.do?keyfrom=dailei&key=1339235580&type=data&doctype=xml&callback=show&version=1.1&q=API");            }        });    }}
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